Great Circle Associates List-Managers
(January 2001)
 

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Subject: Re: preventing majordomo to respond to messages from outside the the domain.
From: J C Lawrence <claw @ kanga . nu>
Date: Mon, 08 Jan 2001 20:16:18 -0800
To: John R Levine <johnl @ iecc . com>
Cc: Bernie Cosell <bernie @ fantasyfarm . com>, "'list-managers @ greatcircle . com'" <list-managers @ GreatCircle . COM>
In-reply-to: Message from John R Levine <johnl @ iecc . com> of "Mon, 08 Jan 2001 16:50:31 EST." <Pine . BSI . 4 . 05L . 10101081648560 . 20588-100000 @ tom . iecc . com>
References: <Pine . BSI . 4 . 05L . 10101081648560 . 20588-100000 @ tom . iecc . com>

On Mon, 8 Jan 2001 16:50:31 -0500 (EST) 
John R Levine <johnl @
 iecc .
 com> wrote:

> In this particular case, the From: line is the only one that makes
> sense to test.  You don't care where the mail was injected into
> SMTP, you care whether it's a KLM address or some other
> organization, and the sender's domain tells you that.

Given that the From: header is untrustworthy it would seem smarter
to check on the envelope, which while also untrsutworthy, is less so
(most/all mail clients can forge From: headers, fewer can forge
envelopes).

> Majordomo responds to the address on the From: line, after all.

So check both.

-- 
J C Lawrence                                       claw @
 kanga .
 nu
---------(*)                          http://www.kanga.nu/~claw/
--=| A man is as sane as he is dangerous to his environment |=--



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From: "Bos, P.G.J. - SPLXM" <Pieter . Bos @ klm . nl>
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